2 Thessalonians 3:6

Now we command you, brethren, in the name of our Lord Jesus Christ, that ye withdraw yourselves from every brother that walketh disorderly, and not after the tradition which he received of us.

1 Corinthians 5:9

I wrote unto you in an epistle not to company with fornicators:

2 Thessalonians 3:14-15

And if any man obey not our word by this epistle, note that man, and have no company with him, that he may be ashamed. {by...: or, signify that man by an epistle}

1 Corinthians 5:3-5

For I verily, as absent in body, but present in spirit, have judged already, as though I were present, {concerning} him that hath so done this deed, {judged: or, determined}

2 John 1:10-11

If there come any unto you, and bring not this doctrine, receive him not into {your} house, neither bid him God speed:

Ephesians 5:11-12

And have no fellowship with the unfruitful works of darkness, but rather reprove {them}.

Ephesians 4:17-19

This I say therefore, and testify in the Lord, that ye henceforth walk not as other Gentiles walk, in the vanity of their mind,

Romans 16:17-18

Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.